COLUMBUS (AP) — An Ohio man exchanged drugs for sexual access to children of drug-addicted parents and took sexually explicit photos of the girls to create child pornography, according to an indictment made public this week.

Larry Dean Porter repeatedly traded drugs for sex with three girls, with several other adults helping transport the victims to Porter’s house, according to the federal indictment and a criminal complaint unsealed Wednesday.

Numerous sources in Scioto County in southern Ohio told the FBI that Porter “was involved in sexually abusing minors, and that such abuse was occurring with the consent of the minors’ parents who were receiving illegal controlled substances from Porter,” the complaint said.

One source told investigators Porter would use “the term ‘babysit’ to refer to the time he spent with children, during which he sexually abused them or took sexually explicit images of them,” according to the complaint. One victim was 7 years old, the indictment said.

Porter, 69, is also accused of trading drugs for sex with adult female drug addicts, and of possessing several guns he used to threaten both those women and the girls from revealing his abuse, the indictment said.

Porter’s court-appointed public defender declined comment. The U.S. Attorney’s Office in Columbus planned to discuss details of the indictment later Wednesday.

Eight other adults were charged, including two of Porter’s adult daughters and a cousin of Porter.